LOUISVILLE, Ky. – As the temperature drop, doctors at UofL Health are warning about cold weather safety. “Frostbite can happen when your fingers get pale and when they start to get waxy and numb. We start worrying about your blood vessels are starting to cut off a little bit of that supply. So pain is one of the first things we worry about where we try to get back into the heat, get some gloves on, or protect that area,” said Dr. Evan Kuhl, UofL Health Jewish Hospital’s Medical Director and Emergency Medicine Physician.